Some of Abu Dhabi's genuinely best experiences don't cost anything — starting with its most famous landmark.
Free entry to a world-class landmark is genuinely rare, and it's the standout entry on any free-things-to-do list for Abu Dhabi — budget a couple of hours and dress modestly.
Walking, cycling or simply sitting along the Corniche costs nothing, and Corniche Beach itself is a free public beach with proper facilities — a genuinely good way to spend an afternoon without spending a dirham on entry fees.
Wandering through Al Maryah Island's Galleria, admiring Etihad Towers from outside, or exploring the older downtown grid near Qasr Al Hosn all cost nothing beyond transport, and give a genuine feel for the city beyond its ticketed attractions.